<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form action="studentServlet" method="post">
      <input type="hidden" name="flag" value="login">
      账号<input type="text" name="username"><br>
      密码<input type="password" name="psw"><br>
      <input type="submit"  value="登录">
      <a href="enroll.html" style="text-decoration: none;display: inline-block"><input type="button" value="注册"></a>
    </form>
</body>
</html>
